Update: A press email from The Pokémon Company International says the following:

“This new Pokémon shares many traits with Mewtwo and it's suspected that the newly discovered Pokémon has a connection with Mewtwo—a powerful Pokémon that debuted in Pokémon Red and Pokémon Blue.

What is this new Pokémon? How will you encounter it in Pokémon X and Pokémon Y? When will you know more? One thing is clear, your readers will certainly want to debate the meaning of this new Pokémon!

”

-- The Pokémon Company International

Last week, Game Freak Director Junichi Masuda appeared in a special preview at the end of Pokémon Smash, confirming that he will be appearing in the next episode to reveal new information about the upcoming Pokémon X and Y for the Nintendo 3DS. After a week of anticipation, the episode has finally aired and we now have confirmation of a Pokémon that has a connection with the Genetic Pokémon Mewtwo.